Silver polishing machine



6, 1 4- D. MAscARENo 1,945,908

S ILVER POLISHING MACHINE Filed Nov. 14, 1932 2 Sheets-Sheet 1 20 .22 'I 2s g I] ll H II II II Ill" H II ll H II II I] I:

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Feb. 6, 1934. D MAS NO S ILVER POLI SHING MACHINE Filed Nov. 14, 1932 2 Sheets-Sheet 2 fljgv4a' 26' 5.9 39

Vivi" 11 H 1| u n u n n n 1] IHIHHI IHII 1 F 11 II II M n Patented Feb. 6, 1934 UNITED STATES I SILVER POLISHING MACHINE Donaciano Mascarefio, Los Angeles, Calif.

Application November 14, 1932 Serial No. 642,507

1 Claim (01. 51-164 This invention relates to burnishing or polishing machines for silver-ware, viz, knives, forks and spoons, in which the polishing is effected through contact with steel balls of substantially I the same diameter as buck-shot, within a rotating drum or tumbler.

Although the above type of polishingmachine very effectively serves its intended purpose it not only requires time to remove the silver-ware 10 from the drum, but the attendants hands often become scratched or injured.

It is therefore the object of this invention to provide a receptacle for use in connection with polishing machines of the character referred to whereby the silver-ware may be readily removed without the necessity of handling the same.

Other objects and advantages will be apparent from the following description, reference being had to the accompanying drawings, in which:

Fig. 1 is a top plan view of a polishing machine equipped with the device of the present invention.

Fig. 2 is a longitudinal vertical section taken through the machine.

Fig. 3 is an enlarged transverse section taken on line 3-3 of Fig. 2.

Fig. 4 is a top plan view of the receptacle removed from the polishing machine.

Fig. 5 is a side elevation taken in the direction indicated by the arrow 5 of Fig. 4.

Fig. 6 is a longitudinal section taken substantially on line 6-6 of Fig. 4.

Fig. 7 is a vertical section taken on line 7-7 of Fig. 6.

Fig. 8 is an end elevation taken in the direction indicated by the arrow 8 of Fig. 5.

Referring more specifically to the drawings, 10 generally designates a polishing machine of conventional design which consists of a drum or tumbler 12 that is rotatably mounted'in a tank 13, which tank is supported at each end thereof on standards 14.

Drum 12 is of polygonal shape in cross section, preferably octagonal as shown in Fig. 3, and is provided with a lid or top 15 hingedly connected as indicated at 16 to a base or body portion 1'7,

the lid being held closed (during rotation) by suitable clamping devices 18.

Projecting from the opposite end walls of the drum through suitable bearings 19 carried by tank 13 are shafts 20 which rotatably support the drum, one of said shafts being interconnected through suitable transmission (not shown) within a casing 21 to the shaft of an electric motor 22 which serves to impart rotation to the drum.

It will also be understood that the transmission from the motor to the drum is controlled by a suitable clutch operated by a' shift lever 23 in order that the drum may be rotated or turned to a position whereby the lid may be opened after stopping of the motor.

The device of the present invention generally designated at 24 is in the form of a receptacle which consists of a pair of rectangular shaped plates 25 and 26, which form the sides, and a plurality of similar plates 27, 28 and 29, that form its bottom, which plates extend between and are secured at each end thereof to frames 30. The frames are preferably formed of comparatively stiff wire and bent on a plurality of planes corresponding to the inner face of the base portion of the drum.

Extending between and secured to frames 30 are a plurality of bars 31, the opposite ends of which project beyond said frames and are curved as indicated at 32, i. e. on a radius corresponding to the comers 33 of the drum.

Positioned within frames 30 are end plates 34, the upper portions 35 of which extend above the base portion of the drum, the end plates being secured to the side and bottom plates by rivets indicated at 36.

The adjacent edges of side and bottom plates are spaced sufficiently apart to permit free passage of the steel balls indicated at B therebetween, and are curved throughout their length as indicated at 37 in orderto prevent damage such as scratching to the silver-ware during rotation of the drum.

Arranged between the sides and bottom plates are a plurality of pins or the like 38 that serve to prevent the knives, forks or spoons from passing through the space between the plates.

Secured to frames 30 are members 39 which engage the upper flaring portions of the drum. Secured to plates 28 and frames 30 are rein- 95. forcing struts 40.

Drum 12 rotates in the direction indicated by the arrow A (see Fig. 3) hence the receptacle 24 should be placed therein in the position shown so that the silver-ware will slide freely over the surfaces of the plates and the balls B pass through the openings therebetween.

In this connection it will be noted that due to the shape of portions 35 in relation to the inner face .of lid 15 and. the clearance allowed therebetween as indicated at 39', said lid may be closed and locked with the receptacle in place. On the other hand, should the receptacle be inadvertently placed in a reversed or opposite position the lid cannot be closed due to H9 contact of the lid with one side of the upper portions 35. Therefore it willbe apparent that the receptacle must be properly positioned in the drum in order to operate the machine.

In operation: The receptacle is placed in the base portion of the drum together with a quantity of the steel balls as shown in Fig. 1, drum is partially filled with soapy water, the silverware to be polished (not shown) is then placed therein, and the lid closed and locked.

The drum is then rotated for a given length of time, usually about four to five minutes. After stopping rotation of the drum the lid is adapted to be opened and the receptacle removed. This may be easily done by grasping the upper portion 35 of the end plates.

During removal, vany of the steel balls above.

the plates will pass through the opening there between into the base portion of the drum. The silver-ware may then be discharged from the receptacle and the operation above described repeated. It will be understood that a portion of the steel balls should be removed in order to permit replacement of the receptacle in the drum, which balls should again be returned to the drum before placing another set of silverware therein.

I claim:

In a polishing machine for silverware including a rotatably mounted drum having a hinged cover and carrying'a polishing medium of balls or the like, a receptacle removably mounted in the drum for separating the silverware from the polishing medium, said receptacle comprising a pair of end plates, a frame secured to each of said end plates, a plurality of spaced bars secured to said frames at each end thereof, a plurality of elongated plartes disposed in angular relation to each other with their longitudinal edges overlapping and extending between and secured to said end walls, and a plurality of pins extending between said plates and bars.

DONACIANO MAscAREfio; 

